Class: Chords::Chord

Inherits:
Object
  • Object
show all
Defined in:
lib/chords/chord.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(title_parts, *notes) ⇒ Chord

Returns a new instance of Chord.



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# File 'lib/chords/chord.rb', line 9

def initialize(title_parts, *notes)
  @title_parts = title_parts
  @notes = notes.flatten
  @root = @notes.first
end

Instance Attribute Details

#notes ⇒ Object (readonly)

Returns the value of attribute notes.



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# File 'lib/chords/chord.rb', line 6

def notes
  @notes
end

#root ⇒ Object

Returns the value of attribute root.



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# File 'lib/chords/chord.rb', line 7

def root
  @root
end

Instance Method Details

#add11 ⇒ Object 



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# File 'lib/chords/chord.rb', line 49

def add11
  chord = Chord.new(@title_parts.dup + ['add11'], @notes + [@root + 17])
  chord.root = @root
  chord
end

#add9 ⇒ Object 



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# File 'lib/chords/chord.rb', line 43

def add9
  chord = Chord.new(@title_parts.dup + ['add9'], @notes + [@root + 14])
  chord.root = @root
  chord
end

#bass(note) ⇒ Object 



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# File 'lib/chords/chord.rb', line 55

def bass(note)
  chord = Chord.new(@title_parts.dup + ["(bass #{note.title})"], [note] + @notes)
  chord.root = @root
  chord
end

#first_inversion ⇒ Object 



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# File 'lib/chords/chord.rb', line 15

def first_inversion
  raise "Not enough notes for inversion" if notes.size < 3
  inversion = Chord.new(@title_parts.dup + ['1st inv.'],
                        @notes[1], @notes[2], @root, *@notes[3..-1])
  inversion.root = @root
  inversion
end

#second_inversion ⇒ Object 



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# File 'lib/chords/chord.rb', line 23

def second_inversion
  raise "Not enough notes for inversion" if notes.size < 3
  inversion = Chord.new(@title_parts.dup + ['2nd inv.'],
                        @notes[2], @root, @notes[1], *@notes[3..-1])
  inversion.root = @root
  inversion
end

#seventh ⇒ Object 



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# File 'lib/chords/chord.rb', line 37

def seventh
  chord = Chord.new(@title_parts.dup + ['7th'], @notes + [@root + 10])
  chord.root = @root
  chord
end

#sixth ⇒ Object 



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# File 'lib/chords/chord.rb', line 31

def sixth
  chord = Chord.new(@title_parts.dup + ['6th'], @notes + [@root + 9])
  chord.root = @root
  chord
end

#title ⇒ Object 



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# File 'lib/chords/chord.rb', line 61

def title
  ret = @root.title
  ret += " #{@title_parts.join(' ')}" unless @title_parts.empty?
  ret
end